CVE-2026-115825
HighCVSS 7.5Exploitation Probability (EPSS)
Elevated risk51th percentile - higher than 51% of all known CVEs
Summary
HTTP::Server::PSGI versions before 1.0056 for Perl allow a single request with a large Content-Length to exhaust server memory. The read buffer grows to the declared length before data arrives, causing an out-of-memory exit. The server runs as a single process, so it stays down until restarted.
Risk Assessment
A remote attacker can take down the application server with one request, causing denial of service. Because the server is single-process, the outage persists until a manual restart.
Recommendation
Update HTTP::Server::PSGI to version 1.0056 or later. Consider enforcing request size limits at the front-end proxy.
Related vulnerabilities
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Original NVD description (English source)
HTTP::Server::PSGI versions before 1.0056 for Perl allow a single request to crash the server by declaring a large Content-Length. The request body is read with sysread() calls sized by the remaining Content-Length. Perl grows the read buffer to the requested length before any data arrives, so the server tries to allocate as much memory as the client declares. A remote attacker can send one request with a large Content-Length and a few body bytes, and perl exits with an out-of-memory error before the application is called. HTTP::Server::PSGI runs as a single process, so the server stays down until restarted.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS